Wideband Code Division Multiple Access Notes (WCDMA)

Wideband Code Division Multiple Access Notes (WCDMA) Definition – What does Wideband Code Division Multiple Access (WCDMA)mean? Wideband Code Division Multiple Access (WCDMA) is a third-generation (3G) standard that employs the direct-sequence code division multiple access (DS-CDMA) channel access method and the frequency-division duplexing (FDD) method to provide high-speed and high-capacity service. WCDMA is the most … Read more

Global System for Mobile Communications (GSM) Notes

Global System for Mobile Communications (GSM)   Services and Architecture If your work involves (or is likely to involve) some form of wireless public communications, you are likely to encounter the GSM standards. Initially developed to support a standardized approach to digital cellular communications in Europe, the “Global System for Mobile Communications” (GSM) protocols are … Read more

Basic Principles of OFDM Notes

Basic Principles of OFDM Notes 1. Introduction The basic principle of OFDM is to split a high-rate datastream into a number of lower rate streams that are transmitted simultaneously over a number of subcarriers. Because the symbol duration increases for lower rate parallel subcarriers, the relative amount of dispersion in time caused by multipath delay … Read more